MISSOULA, Mont. (RWN) - If you converted to Islam from a different religion, you're five times more likely to become a Black Robe than if you were born into the religion, a new study shows.

"We've always known that converts make the best zealots, no matter what the religion or cause," said Edwin Montgomery, a professor of religious studies at the University of Montana. "What we wanted to measure here was the lineage of a Black Robe."

Black Robes, the nation's religious police, are selected from among the most pious members of a community and trained for more than two years at the group's academy in San Francisco.